<template>
    <div class="login_container">
       <div class="login_box">
           <!--头像区域-->
          <div class="avatar_box">
              <img src="../assets/logo.png" alt="">
          </div>
          <!--登录表单区域-->
          <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
              <!--用户名-->
              <el-form-item prop="username">
                  <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
              </el-form-item>
              <!--密码-->
              <el-form-item prop="password">
                  <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima"
                  type="password"></el-input>
              </el-form-item>
              <!--按钮区-->
              <el-form-item class="btns">
                  <el-button type="primary" @click="login">登录</el-button>
                 <el-button type="info" @click="resetLoginForm">重置</el-button>
              </el-form-item>
              
          </el-form>
       </div>
    </div>
</template>

<script>
export default {
    data(){
        return {
            //这是登录表单的数据绑定对象
            loginForm: {
                username:'admin',
                password:'123456'
            },
            //这是表单的验证规则对象
            loginFormRules: {
                //验证用户名是否合法
                username: [
                     { required: true, message: '请输入登录名', trigger: 'blur' },
                     { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                //验证密码是否合法
                password: [
                    { required: true, message: '请输入登录密码', trigger: 'blur' },
                     { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
                ]
            }
        };
    },
    methods:{
        //点击重置按钮，重置登录表单
        resetLoginForm(){
          //console.log(this)
          this.$refs.loginFormRef.resetFields();
        },
        login() {
            this.$refs.loginFormRef.validate(async valid => {
              if (!valid) return;
            const {data: res} = await this.$http.post("login",this.loginForm);
            if (res.meta.status !== 200) return this.$message.error("登录失败！");
            this.$message.success("登录成功！");
            //1. 将登录成功之后的token，保存到客户端的seesionStorage中
            //  1.1 项目中除了登录以外的API接口，必须在登陆之后才能访问
            //  1.2 token 只应在当前网站打开期间生效，所以将 token 保存在 sessionStorage 中
            window.sessionStorage.setItem("token", res.data.token);
            //2. 通过编程式导航跳转到后台主页，路由地址是 /home
            this.$router.push("/home");
            });
        }
    }
    
};
</script>

<style lang="less" scoped>
.login_container {
    background-color: #2b4b6b;
    height: 100%;
}

.login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

   .avatar_box {
        height: 130px;
        width: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%, -50%);
        background-color: #fff;
        img {
             width: 100%;
             height:100%;
              border-radius: 50%;
              background-color: #eee;
        }
    }
}

.login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}

.btns{
    display: flex;
    justify-content: flex-end;
}
</style>